Сеанс ошибка аутентификации nt authority система

asked Feb 12, 2010 at 12:47

I was experiencing a similar error message that I noticed in the Windows Event Viewer that read:

Login failed for user ‘NT AUTHORITYNETWORK SERVICE’. Reason: Failed to open the explicitly specified database. [CLIENT: local machine]

The solution that resolved my problem was:

1. Login to SqlExpress via SQL Server Management Studio
2. Go to the «Security» directory of the database
3. Right-click the Users directory
4. Select «New User…»
5. Add ‘NT AUTHORITYNETWORK SERVICE’ as a new user
6. In the Data Role Membership area, select db_owner
7. Click OK

Here’s a screenshot of the above:

The error message you are receiving is telling you that the application failed to connect to the sqlexpress db, and not sql server.
I will just change the name of the db in sql server and then update the connectionstring accordingly and try it again.

Your error message states the following:

Cannot open database "Phaeton.mdf" requested by the login. The login failed.

It looks to me you are still trying to connect to the file based database, the name «Phaeton.mdf» does not match with your new sql database name «Phaeton».

Hope this helps.

answered Feb 12, 2010 at 16:11

If the error message is just

«Login failed for user ‘NT AUTHORITYNETWORK SERVICE’.», then grant
the login permission for ‘NT AUTHORITYNETWORK SERVICE’

by using

"sp_grantlogin 'NT AUTHORITYNETWORK SERVICE'" 

else if the error message is like

«Cannot open database «Phaeton.mdf» requested by the login. The login
failed. Login failed for user ‘NT AUTHORITYNETWORK SERVICE’.»

try using

"EXEC sp_grantdbaccess 'NT AUTHORITYNETWORK SERVICE'" 

under your «Phaeton» database.

I liked Jed’s solution but the issue with that was every time I built my project in debug mode, it would deploy my database project and removed the user again. so I added this MySQL script to the Post-Deployment script.
it practically does what Jed said but creates the user every time I deploy.

CREATE USER [NT AUTHORITYNETWORK SERVICE]
    FOR LOGIN [NT AUTHORITYNETWORK SERVICE]
    WITH DEFAULT_SCHEMA = dbo;
Go

EXEC sp_addrolemember 'db_owner', 'NT AUTHORITYNETWORK SERVICE'

answered May 18, 2012 at 19:04

You said it worked fine when you were using SQL Express edition. By default express editions create a named instance & run in NT AuthorityNetwork Service.

SQL Server STD by default install a default instance & run in NT AuthoritySYSTEM.

Do you have both the full SQL edition & Express edition installed on the same machine?

1. It could be that somewhere the connection string still refers to the Named instance ‘SQLEXPRESS’ rather than the default instance created by the full version.

2. Also where is the connection string defined? In IIS or your code? Make sure that if defined in many places, all point to same SQL instance & database.

3. Also try looking at the detailed error present in the SQL Server error logs. The error logged in event log are not complete for secuirty reasons. This will also help you to know if the connection was made to the correct SQL Server.

4. Also make sure that the machine on which SQL is installed is accessible & IIS is trying to access the same machine. In my company sometimes due to wrong name resolution, the query fails since most of our computers have SQL installed & the query lands in the wrong SQL Server.

5. Make sure that the database exists in the SQL Server. The name displayed under databases in SQL Management Studio should match that in the connection string.

answered Feb 12, 2010 at 13:12

The SQL Server login required is DOMAINmachinename$. This is the how the calling NT AUTHORITYNETWORK SERVICE appears to SQL Server (and file servers etc)

In SQL,

CREATE LOGIN [XYZGandalf$] FROM WINDOWS

answered Feb 12, 2010 at 12:51

RanjRanj

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